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Why historically do people use 255 not 256 for database field magnitudes?
You often see database fields set to have a magnitude of 255 characters, what is the traditional / historic reason why? I assume it's something to do with paging / memory limits, and performance but the distinction between 255 and 256 has always confused me.
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How can I remove an SSH key?
...If you're trying to perform an SSH-related operation and get the following error:
$ git fetch
no such identity: <ssh key path>: No such file or directory
You can remove the missing SSH key from your SSH agent with the following:
$ eval `ssh-agent -s` # start ssh agent
$ ssh-add -D <ssh ke...
The $.param( ) inverse function in JavaScript / jQuery
Given the following form:
18 Answers
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How to specify the default error page in web.xml?
I am using <error-page> element in web.xml to specify the friendly error page when user encounters a certain error such as error with code of 404:
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Eclipse jump to closing brace
...edninesided
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File upload progress bar with jQuery
... Hello Jam,i implemented ur code but getting 500 internal server error.
– Pramod Pandey
Apr 20 '13 at 7:57
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How to open a specific port such as 9090 in Google Compute Engine
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ERROR: (gcloud.compute.firewall-rules.create) Could not fetch resource: - Insufficient Permission @modulitos
– alper
Mar 6 '18 at 8:53
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Using wget to recursively fetch a directory with arbitrary files in it
I have a web directory where I store some config files. I'd like to use wget to pull those files down and maintain their current structure. For instance, the remote directory looks like:
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How do I apply a diff patch on Windows?
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@SheriffMd Don't you receive the error "D:\Folder is not a working copy" ?
– onmyway133
Feb 26 '13 at 11:26
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List of zeros in python [duplicate]
How can I create a list which contains only zeros? I want to be able to create a zeros list for each int in range(10)
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